regarding clean up, if you are referring to the crescent shaped marking just beyond the reeds for instance, you can use your selection tool to surround just that mark, set your brush to random strokes using a size less than half the size of the brush you have just used, meaning size according to the top toolbar not the random strokes panel, and just give a quick burst, very often that is all that is needed, really you only need worry about patches which mar the picture - as that one does sticking out like a sore thumb. If you feather the selection using this techique you can do virtually invisible repairs to an image.
children paint because they don't know they can't - so what happens as we become adults? - Me
Life is very nice, but it has no shape. The object of art is actually to give it some, and to do it by every artifice possible - truer than the truth. - Jean Anouilh 1910-87